//---------------------------------------------------
// This function loads the parts of your skeleton 
// (navbar, footer, and other things) into html doc. 
//---------------------------------------------------
function loadSkeleton() {

            // No user is signed in.
            console.log($('#navbarPlaceholder').load('./text/nav_before_login.html'));
            console.log($('#footerPlaceholder').load('./text/footer.html'));

}
loadSkeleton(); //invoke the function